HOW TO KNOW THE FRESH-WATER ALGAE 



Lagynion 



p. 147, fig. 246 

 Rhizochrysis 



p. 148, fig. 249 



3. Order Chrysocapsales 

 Family Chrysocapsaceae 



Chrysocapsa 



p. 157, fig. 268 

 Phaeosphaera 



p. 156, fig. 267 

 Family Hydruraceae 

 Hydrurus 



p. 144, fig. 241 



4. Order Chrysosphaerales 

 Family Chrysotomataceae 



Chrysostrella 

 p. 146, fig. 245 



5. Order Chrysotrichales 

 Family Phaeothamniaceae 



Phaeothamnion 

 p. 144, fig. 242 



SUB-DIVISION BACILLARIO- 



PHYCEAE 



1. Order Centrales 



Family Coscinodiscaceae 

 Melosiia 



p. 186, fig. 328 



Stephanodiscus 

 p. 186, fig. 329 



2. Order Pennales 



Family Fragilariaceae 

 Asterionella 



p. 187, fig. 333 

 Fragilaria 



p. 186, fig. 330 

 Tabellaria- 

 p. 187, fig. 331 

 Family Achnanthaceae 

 Cocconeis 

 p. 188, fig. 337 

 Family Gomphonemataceae 

 Gomphonema 

 p. 188, fig. 335 

 Family Meridionaceae 

 Meridion 



p. 187, fig. 332 

 Family Naviculaceae 

 Navicuia 



p. 188, fig. 334 

 Family Surirellaceae 

 Surirella 



p. 188, fig. 336 



VI. PHYLUM (DIVISION) CYANOPHYTA 



A. SUB-DIVISION MYXOPHY- 

 CEAE 

 1. Order Chroococcales 



Family Chroococcaceae 

 Aphanocapsa 



p. 182, fig. 320 

 Apanothece 



p. 185, fig. 327 

 Chondrocystis 



p. 177, fig. 309 

 Chroococcus 



p. 180, fig. 316 

 Coelosphaeiium 



p. 182, fig. 319 

 Dactylococcopsis 



p. 184, fig. 323 

 Glaucocystis 



p. 129, fig. 208 



Gloeocapsa 



p. 180, fig. 315 

 Gloeochaete 



p. 128, fig. 206 

 Gloeothece 



p. 185, fig. 325 

 Gomphosphaeria 



p. 179, fig. 314 

 Holopedium 



p. 181, fig. 317 

 Marssoniella 



p. 184, fig. 324 

 Merismopedia 

 ' p. 179, fig. 313 

 Microcystis 



p. 181, fig. 318 

 Rhabdoderma 



p. 185, fig. 326 



196 



